JVR-381 Slim Three Phase Voltage Monitoring Relay With CE , CCC Cetification

JVR-381 Slim Three Phase Voltage Monitoring Relay With CE , CCC Cetification

Product Overview
JVR series voltage phase sequence multi-function protector (also called three-phase power monitor, phase sequence protector, over voltage protection device, etc.) is mainly used for AC 50/60Hz, rated voltage below 460V, industrial three-phase 220V, 380V, 440V, 460V and other voltage level fault detection provide relay protection for the three-phase input power supply voltage is too high, voltage is too low, phase failure, the wrong phase (phase sequence), three-phase voltage imbalance, etc., the product is widely used For air compressors, motors, distribution boxes, pumps, oil pumps, central air conditioning units, electric control boxes, power distribution cabinets, cranes, etc., such as central air conditioning compressor protection, power monitoring of various elevators, water pump, oil pump protection phase The reverse phase protection is an indispensable protection product that maintains the normal working voltage of the equipment during operation of industrial equipment.


Normal working conditions
1 The altitude does not exceed 2000m.
2 Ambient air temperature -25 °C ~ 65 °C, 24h average temperature does not exceed 55 °C.
3 Humidity < 90%, allowing a small amount of condensation.
4 The pollution level is 4.
5 Use in areas without significant shaking, impact and vibration.

Structural features
1 Installation method: The monitor base adopts rail type, and two M4 screw holes are arranged inside, and it can be directly installed independently or mounted on the HT35 rail.
2 Indicator lights: 5 indicators to indicate normal, phase failure, three-phase unbalanced, wrong phase (phase sequence), overvoltage, undervoltage.
3 Overall dimensions: 68mm x 30mm x 76mm.

Protection features
1 Static Phase Loss Protection: When the protected circuit is in the non-operating state, a phase failure occurs in any phase and it immediately acts.
2 Dynamic phase-failure protection: When the motor is in the running state of the protected circuit, a phase failure occurs in any phase and it immediately acts.
3 Voltage unbalance protection: It refers to a kind of voltage unbalanced protection that the three-phase voltage imbalance will affect the safe operation of the line, and immediately act.
4 Phase Off (Phase Sequence) Protection: The phase sequence of the power input to the protected line is wrong, and it immediately acts.
5 Overvoltage protection: It refers to the voltage of the protected circuit is higher than the set value, delay 3-8 seconds after the action.
6 Undervoltage protection: It refers to that the voltage of the protected circuit is lower than the set value and delays after 3-8 seconds.
7 relay action form: After the device is connected to three-phase power, if the three-phase voltage of the power grid is normal and the phase sequence is consistent with the phase sequence of the device, the normally open contact of the relay will close and the green (normal) light will be on. Conversely, if the device is not powered on, the relay will not open and the normally open contact will open. The green (normal) light will not be on.

Voltage protection range
Factory default (Type A): overvoltage protection +10%, undervoltage protection -10%.
After the band B: over-voltage protection +15%, under-voltage protection -15%.
After the belt T - over and under pressure set according to customer requirements.
After the belt W - adjustable over-pressure setting, adjustment range of ± 15%.

Main technical data
1 Main circuit:
1) Rated voltage: 220VAC, 380VAC, 440VAC, 460VAC.
2) Main circuit connection wires: Insulated copper wire has a 1.0~2.5mm load area. If a single strand of copper wire can be directly inserted into the terminal; if a flexible wire is used, a needle-type connector must be added to the wire to ensure reliable connection.
2 Auxiliary circuit:
1) There is a normally open and a normally closed contact that are electrically inseparable.
2) Use category: AC15, DC13
3) Contact voltage: 250VAC or 30VDC
4) Contact current: 250VAC 2A, 30VDC 1.5A
5) Appointment of heating current: 5A

♦ Features

-- Three-phase monitoring of phase sequence, phase loss and phase unbalance

-- Powered by the measuring circuit

-- 1 C/O contact

-- 3 LEDs for status indication

♦ Protective Functions

-- Phase sequence

-- Phase loss

-- Phase unbalance

♦ Typical Applications

• Pumps • Fans

• Blowers • Motors

• Compressors

♦ Approvals

• CE • CCC

♦ Technical data